Rapidity distributions in exclusive Z+jet and γ+jet events in pp collisions at s √ =7 TeV
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Chatrchyan, Serguei; Brochero Cifuentes, Javier Andrés





Date
2013-12Derechos
Attribution 3.0. © 2013 CERN, for the CMS Collaboration
Publicado en
Physical review. D, Particles, fields, gravitation, and cosmology, vol. 88, art. nun. 112009 (2013)
Publisher
American Physical Society
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Abstract:
Rapidity distributions are presented for events containing either a Z boson or a photon with a single jet in proton-proton collisions produced at the CERN LHC. The data, collected with the CMS detector at s √ =7 TeV , correspond to an integrated luminosity of 5.0 fb −1 . The individual rapidity distributions of the boson and the jet are consistent within 5% with expectations from perturbative QCD. However, QCD predictions for the sum and the difference in rapidities of the two final-state objects show discrepancies with CMS data. In particular, next-to-leading-order QCD calculations, and two common Monte Carlo event generators using different methods to match matrix-element partons with parton showers, appear inconsistent with the data as well as with each other.
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